Top 10 Terraform Modules for Infrastructure as Code

Are you tired of manually deploying infrastructure every time you need to spin up a new environment? Do you want to automate your infrastructure deployment process and save time and effort? If so, you need to start using Terraform modules for Infrastructure as Code (IaC).

Terraform is an open-source tool that allows you to define and manage your infrastructure as code. With Terraform, you can create, modify, and destroy infrastructure resources such as virtual machines, networks, and storage accounts in a declarative way. Terraform modules are reusable code blocks that encapsulate a set of resources and their dependencies, making it easy to manage complex infrastructure deployments.

In this article, we will introduce you to the top 10 Terraform modules for Infrastructure as Code that you can use to automate your infrastructure deployment process.

1. AWS VPC Module

The AWS VPC module is a Terraform module that allows you to create a Virtual Private Cloud (VPC) in AWS. A VPC is a logically isolated section of the AWS cloud where you can launch AWS resources in a virtual network that you define. With the AWS VPC module, you can create a VPC, subnets, route tables, and security groups in a few lines of code.

module "vpc" {
  source = "terraform-aws-modules/vpc/aws"
  name   = "my-vpc"
  cidr   = "10.0.0.0/16"
}

2. AWS EC2 Module

The AWS EC2 module is a Terraform module that allows you to create EC2 instances in AWS. EC2 instances are virtual machines that you can use to run your applications and services. With the AWS EC2 module, you can create EC2 instances, attach EBS volumes, and configure security groups in a few lines of code.

module "ec2" {
  source              = "terraform-aws-modules/ec2-instance/aws"
  version             = "2.16.0"
  name                = "my-ec2-instance"
  ami                 = "ami-0c55b159cbfafe1f0"
  instance_type       = "t2.micro"
  subnet_id           = module.vpc.private_subnets[0]
  associate_public_ip = true
  security_groups     = [module.vpc.default_security_group_id]
}

3. AWS RDS Module

The AWS RDS module is a Terraform module that allows you to create a Relational Database Service (RDS) instance in AWS. RDS is a managed database service that makes it easy to set up, operate, and scale a relational database in the cloud. With the AWS RDS module, you can create an RDS instance, configure the database engine, and set up backups in a few lines of code.

module "rds" {
  source = "terraform-aws-modules/rds/aws"
  engine            = "mysql"
  engine_version    = "5.7"
  instance_class    = "db.t2.micro"
  allocated_storage = 10
  name              = "my-rds-instance"
  username          = "admin"
  password          = "password"
  vpc_id            = module.vpc.vpc_id
  subnet_ids        = module.vpc.private_subnets
}

4. AWS S3 Module

The AWS S3 module is a Terraform module that allows you to create an S3 bucket in AWS. S3 is a highly scalable and durable object storage service that you can use to store and retrieve any amount of data from anywhere on the web. With the AWS S3 module, you can create an S3 bucket, configure access policies, and enable versioning in a few lines of code.

module "s3" {
  source = "terraform-aws-modules/s3-bucket/aws"
  bucket_name = "my-s3-bucket"
  versioning_enabled = true
  acl = "private"
  force_destroy = true
}

5. AWS CloudFront Module

The AWS CloudFront module is a Terraform module that allows you to create a CloudFront distribution in AWS. CloudFront is a content delivery network (CDN) that you can use to deliver your static and dynamic web content, including HTML, CSS, JavaScript, and images, to users around the world. With the AWS CloudFront module, you can create a CloudFront distribution, configure caching behavior, and set up SSL certificates in a few lines of code.

module "cloudfront" {
  source = "terraform-aws-modules/cloudfront/aws"
  aliases = ["my-domain.com"]
  default_root_object = "index.html"
  price_class = "PriceClass_All"
  acm_certificate_arn = "arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012"
  s3_origin_config = {
    origin_access_identity = module.cloudfront_s3_origin_access_identity.cloudfront_access_identity_path
    domain_name = module.s3.bucket_regional_domain_name
  }
}

6. AWS Lambda Module

The AWS Lambda module is a Terraform module that allows you to create a Lambda function in AWS. Lambda is a serverless compute service that you can use to run your code without provisioning or managing servers. With the AWS Lambda module, you can create a Lambda function, configure the runtime environment, and set up triggers in a few lines of code.

module "lambda" {
  source = "terraform-aws-modules/lambda/aws"
  function_name = "my-lambda-function"
  runtime = "nodejs14.x"
  handler = "index.handler"
  memory_size = 128
  timeout = 10
  environment_variables = {
    MY_ENV_VAR = "my-value"
  }
  source_code_hash = filebase64sha256("lambda.zip")
  s3_bucket = module.s3.bucket
  s3_key = "lambda.zip"
  role = module.lambda_role.arn
}

7. AWS IAM Module

The AWS IAM module is a Terraform module that allows you to create IAM resources in AWS. IAM is a service that you can use to manage access to AWS resources securely. With the AWS IAM module, you can create IAM users, groups, roles, and policies in a few lines of code.

module "iam" {
  source = "terraform-aws-modules/iam/aws"
  create_iam_users = true
  iam_users = [
    {
      name = "my-user"
      password = "my-password"
      groups = ["my-group"]
    }
  ]
  create_iam_groups = true
  iam_groups = [
    {
      name = "my-group"
      policies = [
        {
          name = "my-policy"
          policy = jsonencode({
            Version = "2012-10-17"
            Statement = [
              {
                Effect = "Allow"
                Action = [
                  "s3:GetObject",
                  "s3:PutObject"
                ]
                Resource = [
                  "arn:aws:s3:::my-bucket/*"
                ]
              }
            ]
          })
        }
      ]
    }
  ]
}

8. Google Cloud Platform Compute Engine Module

The Google Cloud Platform Compute Engine module is a Terraform module that allows you to create Compute Engine instances in GCP. Compute Engine is a virtual machine service that you can use to run your applications and services in the cloud. With the Google Cloud Platform Compute Engine module, you can create Compute Engine instances, attach disks, and configure firewall rules in a few lines of code.

module "gce" {
  source = "terraform-google-modules/compute-engine/google"
  project_id = "my-project"
  zone = "us-central1-a"
  name = "my-gce-instance"
  machine_type = "n1-standard-1"
  boot_disk_image = "debian-cloud/debian-10"
  network_interface = {
    network = "default"
    access_config = {}
  }
  firewall_rules = [
    {
      name = "allow-http"
      direction = "INGRESS"
      action = "allow"
      protocols = ["tcp"]
      ports = ["80"]
      source_ranges = ["0.0.0.0/0"]
    }
  ]
}

9. Google Cloud Platform Cloud Storage Module

The Google Cloud Platform Cloud Storage module is a Terraform module that allows you to create a Cloud Storage bucket in GCP. Cloud Storage is a highly scalable and durable object storage service that you can use to store and retrieve any amount of data from anywhere on the web. With the Google Cloud Platform Cloud Storage module, you can create a Cloud Storage bucket, configure access policies, and enable versioning in a few lines of code.

module "gcs" {
  source = "terraform-google-modules/cloud-storage/google"
  project_id = "my-project"
  name = "my-gcs-bucket"
  versioning = true
  uniform_bucket_level_access = true
  lifecycle_rules = [
    {
      action = {
        type = "Delete"
      }
      condition = {
        age = 30
      }
    }
  ]
  labels = {
    environment = "dev"
  }
}

10. Azure Virtual Machine Module

The Azure Virtual Machine module is a Terraform module that allows you to create a virtual machine in Azure. A virtual machine is a virtualized computer that you can use to run your applications and services. With the Azure Virtual Machine module, you can create a virtual machine, attach disks, and configure network security groups in a few lines of code.

module "vm" {
  source = "Azure/compute/azurerm"
  name = "my-vm"
  location = "eastus"
  resource_group_name = "my-resource-group"
  vm_size = "Standard_B1s"
  admin_username = "adminuser"
  admin_password = "Password1234!"
  os_disk_name = "my-os-disk"
  os_disk_caching = "ReadWrite"
  os_disk_create_option = "FromImage"
  image_publisher = "Canonical"
  image_offer = "UbuntuServer"
  image_sku = "18.04-LTS"
  network_interface_ids = [module.nic.id]
  tags = {
    environment = "dev"
  }
}

Conclusion

In this article, we have introduced you to the top 10 Terraform modules for Infrastructure as Code that you can use to automate your infrastructure deployment process. With these modules, you can create and manage your infrastructure resources in a declarative way, saving time and effort. Whether you are deploying your infrastructure in AWS, GCP, or Azure, these modules will help you get started quickly and easily. So, what are you waiting for? Start using Terraform modules for Infrastructure as Code today and take your infrastructure deployment process to the next level!

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